Ryōtsu-minato weather in June

In June, Ryōtsu-minato sees average daytime highs of 22°C and overnight lows near 18°C, with 124 mm of rain across 10.5 wet days and about 14.6 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 21°C in the first days to 24°C by the end. The sky is clear or mostly clear about 23% of the time in June, and the air most often feels humid.

Daylight stretches from about 14 h 24 min at the start of June to 14 h 36 min by month's end. Set against the rest of the year, June is Ryōtsu-minato's 8th-clearest and 12th-windiest month. For the whole year in context, see Ryōtsu-minato's year-round climate.

Daytime high
22°
4th warmest
Overnight low
18°
9th coldest
Rainfall
124 mm
10.5 wet days
Daylight
14 h 36 min
4:28 AM – 7:05 PM
Cloud cover
68%
8th clearest
Wind
10 km/h
12th windiest
Solar energy
5.8 kWh/m²
Travel score
6.4
out of 10

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 21°C in the first days to 24°C by the end.

A typical June day in Ryōtsu-minato reaches about 22°C in the afternoon and slips back to 18°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 25°C. Set against its neighbours, June runs about 4°C warmer than May and about 4°C cooler than July.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12116
22116
32116
42116
52117
62117
72217
82217
92217
102217
112217
122218
132218
142218
152218
162218
172318
182318
192319
202319
212319
222319
232319
242319
252319
262420
272420
282420
292420
302420

How June really feels in Ryōtsu-minato

Once humidity and wind are folded in, June averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

June sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ryōtsu-minato weather by month

How June compares with the rest of the year at a glance. June is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 13221.49.89.70.2
Feb / 9117.68.210.50.3
Mar / 10116.23.311.71.4
Apr13° / 8912.20.2133.5
May18° / 13°92110145.8
Jun22° / 18°12410.5014.66.4
Jul26° / 22°20514.3014.45.8
Aug28° / 24°14612.1013.55.6
Sep25° / 21°14212.5012.36.2
Oct19° / 15°13613.20115.7
Nov14° / 10°13717.30.19.93.3
Dec / 15421.64.89.41.1

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in June.

Beyond those clear spells, partly cloudy skies cover about 13% of June, with mostly cloudy or overcast conditions the remaining 64%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14555
24555
34456
44357
54357
64258
74258
84060
94060
103961
113961
123763
133664
143664
153565
163565
173466
183466
193367
203466
213268
223268
233169
243070
253070
263070
272971
282872
292971
302971

Chance of precipitation in June

Any precipitation

Ryōtsu-minato gets around 124 mm of rain over 10.5 wet days in June. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 36% and peaks near 47% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
128
228
328
428
528
628
729
829
930
1030
1131
1232
1333
1433
1534
1635
1736
1837
1938
2038
2139
2240
2341
2442
2543
2644
2745
2845
2946
3047

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

Most of June feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, June lands in the humid band about 38% of days. Sticky, muggy-or-worse air turns up on roughly 22% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
133481810
230482110
328482310
425482520
523472820
621463030
719443340
818423550
916413860
1015394070
1113374280
12123544100
13113345110
14103147130
1592948150
1682748170
1772549191
1872348211
1962148231
2052048262
2141847282
2241745313
2331644334
2421443365
2521341386
2611239417
2711137439
28110354510
2918324712
3017304813

Wind in June

Winds average 10 km/h in June, the calmest month.

Across June, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in June

DaylightNight

Daylight runs from about 14 h 24 min at the start of June to 14 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over June. Sunrise moves from 4:31 AM to 4:31 AM, and sunset from 6:57 PM to 7:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.44:316:57
214.54:306:58
314.54:306:58
414.54:296:59
514.54:297:00
614.54:297:00
714.54:297:01
814.64:287:01
914.64:287:02
1014.64:287:03
1114.64:287:03
1214.64:287:04
1314.64:287:04
1414.64:287:05
1514.64:287:05
1614.64:287:05
1714.64:287:06
1814.64:287:06
1914.64:287:06
2014.64:287:07
2114.64:287:07
2214.64:287:07
2314.64:297:07
2414.64:297:08
2514.64:297:08
2614.64:297:08
2714.64:307:08
2814.64:307:08
2914.64:307:08
3014.64:317:08

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 5.8 kWh/m².

For context, solar energy here swings from a low near 1.73 kWh/m² to a high of 5.85 kWh/m² in May across the year — June's 5.8 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.1Intense
56.1Intense
66.1Intense
76.1Intense
86.1Intense
96.0Intense
106.0Bright
116.0Bright
125.9Bright
135.9Bright
145.8Bright
155.8Bright
165.8Bright
175.7Bright
185.7Bright
195.6Bright
205.6Bright
215.5Bright
225.5Bright
235.5Bright
245.4Bright
255.4Bright
265.3Bright
275.3Bright
285.3Bright
295.2Bright
305.2Bright
Planning a trip in June

Hazard calendar for Ryōtsu-minato

In seasonPeak

In June, Ryōtsu-minato sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Ryōtsu-minato sits in the Pacific typhoon belt; the season peaks July–October.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is June a good time to visit Ryōtsu-minato?

Our two travel scores rate June for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.4
Sightseeing
1st-best month of the year
4.6
Beach & pool
4th-best month of the year

June is a reasonable time to visit Ryōtsu-minato for sightseeing.

What to pack for Ryōtsu-minato in June

From June's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In June, Ryōtsu-minato sees daytime highs around 22°C and nights near 18°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Ryōtsu-minato in June

The nearest coast averages about 19°C in June — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 26°C and coldest in March near 10°C.

It's comfortable for a long swim from Jun 24 to Oct 29 — about 4.2 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar10Bracing
Apr11Bracing
May14Bracing
Jun19Cool
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov18Cool
Dec15Cool

UV index in Ryōtsu-minato in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ryōtsu-minato peaks around August 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 14UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug10Very high
Sep8Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Ryōtsu-minato in June

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where June falls, not just the annual average.

Air quality in Ryōtsu-minato is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1220 µg/m³Oct 129 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar20Moderate
Apr20Moderate
May18Moderate
Jun14Moderate
Jul12Moderate
Aug10Good
Sep9Good
Oct9Good
Nov10Good
Dec9Good
Location & terrain

Where is Ryōtsu-minato?

Ryōtsu-minato sits at 38.1°N, 138.4°E, 4 m above sea level, in Japan. The nearest listed city is Sado, 9.0 km away.

Topography around Ryōtsu-minato

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ryōtsu-minato.

Within 3 km, the terrain around Ryōtsu-minato has only modest variations in elevation — a maximum elevation change of 102 m around an average of 11 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,155 m; within 80 km, large variations in elevation — a maximum elevation change of 1,125 m.

The land around Ryōtsu-minato is covered by water (50%) and trees (23%) within 3 km, trees (55%) and water (34%) within 16 km, and water (78%) within 80 km.

3 km
102 m
16 km
1,155 m
80 km
1,125 m
treesgrasslandcroplandartificial surfaceswater
June weather nearby: Sado 9.0 km · Maki 53 km · Niigata 55 km · Yoshida-kasugachō 59 km · Shirone 62 km · Tsubame 63 km · Kameda-honchō 63 km · Niitsu-honchō 67 km

Japan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
100 V · 50 / 60 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$35,951
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.2
per 100k, 2023
Road deaths
3.6
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 446
Religion
Shintoism 49%Buddhism 46%other 4%Christianity 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Ryōtsu-minato (38.0782°, 138.4394°, elevation 4 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).